National Weather Service Forecast for:
Affton MO Issued by: National Weather Service Saint Louis, MO |
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Updated: 3:41 am CDT Jul 25, 2025 | ||||||||||||||||||
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Extreme Heat Warning
Hazardous Weather Outlook
Today |
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 94. Heat index values as high as 106. Southeast wind 3 to 6 mph. |
Tonight |
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 77. South wind 3 to 6 mph. |
Saturday |
A slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95. Heat index values as high as 110. South wind 3 to 7 mph. Chance of precipitation is 30%. |
Saturday Night |
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 77. South wind 3 to 6 mph. |
Sunday |
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96. Calm wind becoming southwest around 5 mph in the afternoon. |
Sunday Night |
Mostly clear, with a low around 79. |
Monday |
Sunny and hot, with a high near 99. |
Monday Night |
Mostly clear, with a low around 80. |
Tuesday |
Sunny and hot, with a high near 99. |
Tuesday Night |
Mostly clear, with a low around 78. |
Wednesday |
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 91. |
Wednesday Night |
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. |
Thursday |
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. |
Forecast from NOAA-NWS for Affton MO.